Cutting Coil Springs

I have a set of intrax coil springs in my 98 with kyb struts and shocks. The front just isnt low enough for me and I want to go down another inch. My question is how do you know how much to cut off of the spring? The car has been lowered for 2 months now. I dont want to cut to much!
A. do I measur 1 inch up on the coil spring
B. Measure 1 inch in from the end of the coil

Im going to have my local speed shop cut the spring for 20 dollars. Im just to unsure of how much to cut to accomplish a 1" drop. I will post pics!